Hmm, I don't know about love in the way you consider the love of a spouse or family. However, I will say I have had great bonds with not only chickens, but other animals. In particular, I have a bantam hen right now who lost all her other siblings. I did alot of things with her similar to the way a mother hen would- I nestled her under my chin in the evening as a baby, showed her where good worms were hidden, and alerted her to possible dangers. While she is independent now, she's very much a momma's girl, and cries for attention whenever I am near. We still take walks together, and work on clicker training to make handling easier. I don't know about love, but it sure seems she enjoys seeing me and being around me.
As to a debate of emotion or memory in animals- I was once told as a child that animals had no attention span. No souls. No feelings. People will believe what they will, BUT, I've been around a few good horses, cats, dogs, and feathered friends that lead me to believe they do keep memory and emotion. They know who has hurt or helped them. As to souls, I have no answer, I just consider them all God's creation. With respect to all animals, this is my opinion.